<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box {
            font-size: 0;
        }

        .ib {
            display: inline-block;
            background-color: rgb(235, 201, 201);
            width: 100px;
            height: 40px;
            font-size: 16px;
        }

        .container {
            width: 1200px;
            height: 500px;
            outline: 1px solid black;
            margin: 0 auto;
            /* outline: 1px solid black; */
            position: relative;
        }
        .content{
            width: 1920px;
            height: 400px;
            background-color: rgb(235, 194, 194);
            position: absolute;
            left: -360px;
            
        }
    </style>
</head>

<body>
    <div class="box">
        <input class="b1" />
        <input class="b2" />
        <div class="ib">
            ib
        </div>
    </div>
    <div class="container">
        <div class="content">
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        </div>
    </div>
</body>

</html>